Transmission-gear.



TRANSM1SS1ON GEAR. APYLUAToN FILED MAY 25, 1908.

Patented Ju1y 4, 1911.

3 SHEETS-SHBET l.

TRANSMISSION GEAR. APPLIOATION FILED MAY 25, 1908.

lafented July 4 ym L W m WM. y @7M a l v l l l I l l IJ 'n NN J. H. GIBSON & H. L. WHITMAN.

TRANSMISSON GEAR. APPLICATION FILED MAY 25,1908.

nected to the' transverse arms of tne valves by universal couplings 18 and a shift sleeve 19 to which the inner ends of said links are pivoted.` The shift sleeve 19 is loosely mounted upon the sleeve 4 around the secondary shaft, and it will be readily perf ceived that when the shiftl sleeve is moved forwardly and backwardly upon said sleeve,

either a thrust or a pull will be imparted to the 'links 17 and that as a consequence the several Valves 13 willbe rotated in vtheir seats in the cylinders 6 with the result of changing the positions of the ports 14 in the valves that are adapted to register with the by-passes in the cylinders.

In the practical use of our transmission gear, the operation is as follows: IVhen it is` f sides and will not be susceptible of moving pistons therein and their' piston rods willl in the cylinders. It will be seen therefore that during the rotation ofthe carrier 1 with the primary shaft and consequent rotation of the cylinders 6, said cyinders, the

act positively upongthe cranks of the seeondary shaft to drive said secondary shaft at a speed corresponding to that of the primary shaft. New, when it is' desired to impart a speed tothe secondary shaft of a degrec less than lthat at which the primary shaft is driven, the valves 13 are opened to permit flow. of fluid through the by-passcs in the cylinders 6, the degree `to which the valves are opened being determined by the amount of flow of fluid it may be desired to permit passage of through the by passes 9 and the consequent reduction of speed of the secondary shaft as compared with the speed of the-primary shaft. To illustrate:

I ,1f it is desired to cause the secondary shaft to be driven at only a slightly decreased speed relative to the primary shaft, the valves would only be opened to' a slight dc,-

' -gree with-the result of permitting only a small flow of fluid through each by-pass and' valve, thus permitting a restricted movement of' each of the pistons in the cylinders.' due' to the` restricted circulation of fluid from one end of each cylindcrfto the other end of'each cylinder, and consetplently causing the piston rods to play in a limited desecondary. shaft at a speed. equal .to that of the primary shaft. To furth'er decrease the speed of thesccondary shaft, it is only necessary to open the yvalves to a requisite degree 1n order that any deslred d1nnmshed speed may be occasioned, due to more freedom of movement of the pistons in the cylinders being permitted. It will be readily understood that the opening of the valves may be continued until there is an unrestrained flow of fluid through the lay-passes at which time the pistons will play idly in the cylinders and become inactive upon the secondary shaft.

In view of possible occurrence vof leakage of fluid from the cylinders 6, we provide automaticfillers for the cylinders adapted. to contain a supply of fluid that may be admitted to the cylinders to compensate for any deficiency of fluid therein. In a lwall of each cylinder 6 is an opening 6. 20 is a reservoir suitably secured to each cylinder at the location vof the opening 6 therein and from which fluid may 'flow through said opening into the cylinder. Theopening 6 is contro-lled by a valve housing 21 that is -seated in the opening and provided 'with a port 22. The port 22 is controlled by a suitable check valve 23, located within the valve housing and held to a seat around said 'port -by` a spring 24. In the event of a deficiency of fluid occurring in either cylinder, the cheek valve 23 opens inwardly and a suflicient amount of fluid passes from the filler reservoir into the cylinder to supply the deficiency, after which said check valve closes and remains in a closed condition until a deficiency of fluid in the cylinder again' occurs. It should be stated that in the event of. a deficiency of fluid occurring in either cylinder, the check. valve is caused to open due to force of fluid thereagainst in order that the -desired flow of fluid may take place` from lvthe filler as it were, to the cylinder. l l

lVe have, in this description of our transmission gear referred to the shaft A as a priu'iary shaft and saidr shaft may also he.

properly termed a driving shaft'. We have further referred to the shaft B as a sec ondary shaft, and this shaft may alsobe properly termed a driven shaft.

.A statcn'ient should now he made that instead of the shaft A serving as a driving shaft and the shaft ll as a driven shaft, the' operation of the parts may he reversed and' the shaft l.- be utilized as the driving shaft to transmit power to the shaft considered as a .driven shaft.

, In View of the statement ustmade we dcsire it to be understood that we do, not limit ourselves to the operation of the gear in the n'iauner hereinl'iel'ore described in detail.

grec so thatthey willl not act upon the cranksof the secondary shaft to drive said IVe claim:

l. In a tranzanission gear, the'combi-nationof a pair of shafts, one of which. is provided with a plurality of cranks, a carrier fixed to the other shaft, fluid holding C *linders each lot carried intermediate of its ends'gby said carrier and eachl containing a pisto'nfway and a by-pass located Wholly Within the cylinder, pistons operable in said piston ays, piston rods connwtetl'ni pairs to sai( istons and said cranks and valves locate, ,n said bypasses and'v adapted to govern the fioiv of fiuid tlierethrough to controltle action of said pistons and piston rods, substantially as set forth.

In a transmission gear, the combination of ay pair of shafts, one of which is provided with a plurality of cranks, and a plurality of fluid controlled means, each carried intermediate of .its ends by the other shaft and each having a piston Way and by-pass located wholly therein, and pistons in the piston ways having piston rods connected in pairs with said cranks.

'3. The combination with a primary shaft, a secondary shaft having` cranks, a supporting,` sleeve in which the secondary shaft is loosely mounted, fluid holding cylinders cach having a piston way and a by-pass, pistons in the piston ways having rods connected with the cranks, the valves, formed with ports, connect-ing the opljiosite ends of the by-passes and provided with transverse. arms, a shift sleeve mounted on the supporting sleeve, and the links connecting the shil't sleeve with the transverse arms of the valve.

a. The combination of a liuid holding' cylinder' for transmitting gear constructed with a piston-Way, a by-pass at one side of the piston-Way, a wall opening, a controlling plug valve, extending across 'the by-pass, and formed with a port connecting` the opposite ends of the by-pass, a spring valve Within the wall opening, and a reservoir supported on the cylinder and in communication with the wall opening.

Vthe combination of a primary shaft, a carrier having supporting arms and fixedly secured Vto the primary shaft, a secondary shaft having,- cranks located between the supporting arms, a supporting' sleeve in which the secondary shaft is loosely mounted, having radial arms connected to the supporting arms, fluid holding cylinders pivoted at their sides to the carrier and cach having a piston-way spaced from the ends of the cylinder and a lay-pass at one side of the piston- Way, pistons in the piston-ways having rods connected with the cranks, the valves extend nig across the by-p assesformed with portsv connecting the opposite ends of the b f passes and provided `with transverse arms, a shift sleeve mounted on the supportin' sleeve, and the'links connecting' the shift sleeve with the transverse arms of the valves.

(5. rllhe combination of a 1n'in1ary shaft, carrier having suliiporting arms and xedly secured to the primary shaft, a secondary shaft having` cranks located between the supporting arms, a su pporting' sleeve in which the secondary shaft isloosely mounted, ha ving' radial arms connected to the supporting arms, fluid holdingr cylinders pivoted at their sides to the carrier, and each having a piston- Way spaced from the ends of the cylinder", a by-pass at one side of the pistonwvay, a Wall opening, a spring' valve Within the wall opening, and a reservoir supported on and in communication ivith the ivall opening, pistons in the lpiston-Ways, having' rods connected with the cranks, the valves extending; across the by-passes, formed with ports connecting the opposite ends of the lay-passes and provided with transverse arms, a shift sleeve mounted upon the supporting sleeve, and the links connecting the shift sleeve with the transverse arms of the valves JAS. H. GBSN. HENRY L. lVl'llTlii In the presence ofh H. Gr. Coon,

BLANCHE HoGAN. 

